A rolling tennis ball cart whose removable bag holds 150 balls, enough to keep a long practice session running without stopping to collect. The bag lifts out entirely, so the balls can be carried or emptied without wheeling the whole frame along with them. Its interior measures 12 by 12 by 13 inches, the walls are visible breathable mesh so the ball count is obvious at a glance and damp balls dry rather than souring inside a closed bag, and two zippers open it from either side. Two side pockets take a phone, keys and small items that would otherwise sit on the ground. The frame is aluminum tube, rustproof and light at 7 lbs total, yet braced in an X-shaped structure that supports up to 66 lbs without flexing when the bag is full. All 4 universal wheels roll smoothly in any direction and 2 of them lock, so the cart stays where it is placed on sloping ground instead of rolling away mid-session. That is the difference between a cart that sits where it is put and one that has to be chased. Standing 16 by 16 by 36 inches, it folds flat when the session ends and slides into the 37.5 by 6 by 6 inch carrying bag included with it. The same cart works just as well for badminton, baseball and pickleball balls. Specification: Color: Black Blue; Material: Aluminum Oxford Cloth; Overall Dimensions: 16" x 16" x 36"; Internal Dimension of Bag: 12" x 12" x 13"; Carry Bag Dimension: 37.5" x 6" x 6"; Weight Capacity: 66 lbs; Net Weight: 7 lbs; Box Qty: 1; Design: Foldable; Removable: Yes